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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

What is the Number of Electrons Donated by a Magnesium Atom and Number of Electrons Accepted by a Sulphur Atom During Their Chemical Combination? - Chemistry

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प्रश्न

What is the number of electrons donated by a magnesium atom and number of electrons accepted by a sulphur atom during their chemical combination?

एका वाक्यात उत्तर
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उत्तर

Two, Two

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पाठ 4: Atoms, Molecules and Radicals - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atoms, Molecules and Radicals
Additional questions | Q 7.1

संबंधित प्रश्‍न

What does 5H2S04 represent ?


Write the molecular formulae of Sodiun sulphide: 


Write the molecular formulae of Iron (II) sulphide :


The valency of sodium is one, write the molecular formula for sodium carbonate ?


The valency of sodium is one, write the molecular formula for sodium hydroxide ?


What is a molecule ? Explain with an example.


Write the cations and anions present, if any, in the following : 

  1. CH3COONa 
  2. NaCl
  3. H2
  4. NH4NO3

If 1 gram of sulphur dioxide contains x molecules, how many molecules will be present in 1 gram of oxygen ?

(S = 32 u ; O = 16 u)


Which contains more molecules, 10 g of sulphur dioxide (SO2) or 10 g of oxygen (O2) ?

(Atomic masses : S = 32 u ; O = 16 u)


What is the number of electrons after the transfer of electrons in magnesium and sulphur atoms.


Diagrammatically represent the transfer of electrons.


‘Dilute hydrochloric acid is added to sodium hydroxide’. Give a word equation and a molecular equation of the same. Is the equation written, a balanced equation. Give reasons.


State the correct formula of the following from the option given:

Calcium hydroxide


Name the following:

A non-metal which forms a polyatomic molecule with more than three atoms.


State true of false. If false, give the correct statement.

Atoms cannot exist alone. They can only exist as groups called molecules.


Define molecule.


Express each of the following in kilograms

58.34 g


Express each of the following in kilograms

5.873×10−21g


______ can be formed by the same or different kinds of atoms.


______ of an element consist of a fixed number of different types of atom.


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